Geometrical OpticsHard
Question
A converging lens of focal length 20 cm and diameter 5 cm is out along the line AB. The part of lens shown shaded in the diagram is now used to from an image of a point P placed 30 cm away from it on the line XY which is perpendicular to the plane of the plane of the lens. The image of P will formed.
Options
A.0.5 cm above XY
B.1 cm below XY
C.on XY
D.1.5 cm below XY
Solution
u = - 30 cm ; h0 = + 0.5cm ; f = 20 cm
v =
= 60 cm m =
= - 2hi = mho = - 2 × 0.5 = - 1 cm from P axis
1 + 0.5 = 1.5 cm below xy.
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